netdev - Re: [PATCH net-next v5 00/11] ethtool: Add support for frame preemption

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Message-ID: <20220523233338.tmwykgwutoigurnu@skbuf>
Date:   Mon, 23 May 2022 23:33:39 +0000
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     Jakub Kicinski <kuba@...nel.org>
CC:     Vinicius Costa Gomes <vinicius.gomes@...el.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "jhs@...atatu.com" <jhs@...atatu.com>,
        "xiyou.wangcong@...il.com" <xiyou.wangcong@...il.com>,
        "jiri@...nulli.us" <jiri@...nulli.us>,
        "davem@...emloft.net" <davem@...emloft.net>,
        Po Liu <po.liu@....com>,
        "boon.leong.ong@...el.com" <boon.leong.ong@...el.com>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
Subject: Re: [PATCH net-next v5 00/11] ethtool: Add support for frame
 preemption

On Mon, May 23, 2022 at 12:52:38PM -0700, Jakub Kicinski wrote:
> My understanding is that DCBNL is not in ethtool is that it was built
> primarily for converged Ethernet. ethtool being a netdev thing it's
> largely confined to coarse interface configuration in such
> environments, they certainly don't use TC to control RDMA queues.
> 
> To put it differently DCBNL separates RoCE and storage queues from
> netdev queues (latter being lossy). It's Conway's law at work.

I had to look up Conway's law, now I get it. Beautiful euphemism, thank you.